Illinois State Senate · 2026 general · 39 of 59 seats up
Democrats keep a majority in the Illinois State Senate
Democrats hold 43 seats and Republicans 12, with 4 still being counted; 30 make a majority. 3 seats changed party.
3 seats flipped to Democrats0 to Republicans4 still uncalled
Seats not up in this election count with their holders. Source: civicAPI unofficial results and race callsUpdated Nov 7, 2026, 3:01 PM ET
Source: civicAPI unofficial results and race callsUpdated Nov 7, 2026, 3:01 PM ET
Every race, by how close it was
All 38 races by the winner’s margin, D − R. The shaded band holds the 2 races decided by under 5 points. Ringed dots flipped; amber dots are still being counted. The 16 seats won without an opponent sit at the ends.
- Democratic
- Republican
- Counting
- Flipped
- Under 5 points
Unofficial returns. Source: civicAPI unofficial results and race callsUpdated Nov 7, 2026, 3:01 PM ET
Seats that flipped
Districts that elected the other party.
Incumbents who lost
Members defeated in the general election.
Closest called races
Smallest winning margins.
Biggest swings
Change in margin from the last race on the same lines.
Source: civicAPI unofficial results and race callsUpdated Nov 7, 2026, 3:01 PM ET
How far each district moved
Change in each contested district’s margin from the previous election, in 2-point bins. The median district moved D +15.2.
14 contested districts; districts uncontested in either election are left out.
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Illinois State Senate in other elections
- 2024 Dem. 40–19
- 2022 Dem. 40–19
- 2020 Dem. 41–18
- 2018 Dem. 40–19
- The Illinois State Senate →
Also on this ballot
Sources